Relationship Stealing

Is it okay to steal someone out of a relationship in which you know they were unhappy?

It's normal for someone who is unhappy in a relationship to break up and to move on with another, but the order is important - first break up, then move on. If you are interested in someone who is clearly in an unhappy relationship, it's fine to let them know you're interested and available...but after you tell them, wait! The best course of action is to give the person time to end their current relationship, rather than to tempt them into cheating. That way, your love won't be forced to lie and betray, and you won't have to stress out over being the other woman/man.